java - 使用 Firebase 在 Android Studio 中进行 JUnit 测试

Question

我想在 Android Studio 中为此类编写单元测试，但由于使用了 Firebase，我在创建覆盖 usersignin() 和 getSignedinUserprofile() 的测试时遇到了问题。有人对这个有经验么？

public class LoginActivity extends AppCompatActivity implements View.OnClickListener{


private Button buttonSignIn;
private EditText editTextEmail;
private EditText editTextPassword;
private TextView textViewSignUp;

private ProgressDialog mProgressDialog;
private FirebaseAuth mfireBaseAuth;
private DatabaseReference mDatabase;
private String userID;
private FirebaseUser firebaseUser;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_login);
    FirebaseApp.initializeApp(this);

    mfireBaseAuth = FirebaseAuth.getInstance();
    mDatabase = FirebaseDatabase.getInstance().getReference();
    mProgressDialog = new ProgressDialog(this);
    editTextEmail = (EditText) findViewById(R.id.editTextEmail);
    editTextPassword = (EditText) findViewById(R.id.editTextPassword);
    buttonSignIn = (Button) findViewById(R.id.buttonSignIn);
    textViewSignUp = (TextView) findViewById(R.id.textViewSignUp);

    buttonSignIn.setOnClickListener(this);
    textViewSignUp.setOnClickListener(this);

}

@Override
public void onClick(View v) {
    if(v == buttonSignIn){
        usersignin();}
    if(v==textViewSignUp){
        startActivity(new Intent(this, RegisterActivity.class));}


}

public void usersignin() {

    String email = editTextEmail.getText().toString().trim();
    String password = editTextPassword.getText().toString().trim();

    if(TextUtils.isEmpty(email)){
        Toast.makeText(this, "Please enter Email", Toast.LENGTH_SHORT).show();
        return;
    }

    if(TextUtils.isEmpty(password)){
        Toast.makeText(this, "Please enter password", Toast.LENGTH_SHORT).show();
        return;
    }

    mProgressDialog.setMessage("Logging in. Please wait...");
    mProgressDialog.show();
    mfireBaseAuth.signInWithEmailAndPassword(email, password).addOnCompleteListener(this, new OnCompleteListener<AuthResult>() {
        @Override
        public void onComplete(@NonNull Task<AuthResult> task) {
            mProgressDialog.dismiss();
            if(task.isSuccessful()){
                getSignedInUserProfile();
            }
        }
    });
}

public void getSignedInUserProfile() {

    DatabaseReference reference = mDatabase;//.child("eduback-2feef");
    firebaseUser = FirebaseAuth.getInstance().getCurrentUser();
    userID = firebaseUser.getUid();
    reference.child("Users").child(userID).child("User info").addListenerForSingleValueEvent(new ValueEventListener() {
        @Override
        public void onDataChange(DataSnapshot dataSnapshot) {
            User user = dataSnapshot.getValue(User.class);
            if(user != null) {
                // Save if the user is student or prof in shared prefs.
                PreferenceHelper helper = new PreferenceHelper(getBaseContext());
                helper.setIsStudent(user.isStudent);
                checkStudentOrProfessor(user);
            }

        }

        @Override
        public void onCancelled(DatabaseError databaseError) {
            // Ups vis error
        }
    });
}

public void checkStudentOrProfessor(User user) {

    Intent i;
    if (user.isStudent ) {
        i = new Intent(this, MainActivityStudent.class);
    } else {
        i = new Intent(this, MainActivityProfessor.class);
    }
    startActivity(i);
}

Answer 1

您可以使用 Mockito 和 PowerMockito 模拟 Firebase 依赖项。对于模拟静态函数(如 FirebaseDatabase.getInstance())，必须使用 PowerMockRunner 来运行测试，但它可以稍后委托(delegate)给不同的运行器。

package com.test.firebasetest;

import com.google.firebase.database.DataSnapshot;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;
import com.google.firebase.database.ValueEventListener;

import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.Mockito;
import org.mockito.invocation.InvocationOnMock;
import org.mockito.stubbing.Answer;
import org.powermock.api.mockito.PowerMockito;
import org.powermock.core.classloader.annotations.PrepareForTest;
import org.powermock.modules.junit4.PowerMockRunner;

import static org.mockito.Matchers.any;
import static org.mockito.Matchers.anyString;
import static org.mockito.Mockito.doAnswer;
import static org.mockito.Mockito.when;

@RunWith(PowerMockRunner.class)
@PowerMockRunnerDelegate(JUnit4.class)
@PrepareForTest({ FirebaseDatabase.class})
public class LoginActivityTest {

  private DatabaseReference mockedDatabaseReference;

  @Before
  public void before() {
    mockedDatabaseReference = Mockito.mock(DatabaseReference.class);

    FirebaseDatabase mockedFirebaseDatabase = Mockito.mock(FirebaseDatabase.class);
    when(mockedFirebaseDatabase.getReference()).thenReturn(mockedDatabaseReference);

    PowerMockito.mockStatic(FirebaseDatabase.class);
    when(FirebaseDatabase.getInstance()).thenReturn(mockedFirebaseDatabase);
  }

  @Test
  public void getSignedInUserProfileTest() {
    when(mockedDatabaseReference.child(anyString())).thenReturn(mockedDatabaseReference);

    doAnswer(new Answer<Void>() {
      @Override
      public Void answer(InvocationOnMock invocation) throws Throwable {
        ValueEventListener valueEventListener = (ValueEventListener) invocation.getArguments()[0];

        DataSnapshot mockedDataSnapshot = Mockito.mock(DataSnapshot.class);
        //when(mockedDataSnapshot.getValue(User.class)).thenReturn(testOrMockedUser)

        valueEventListener.onDataChange(mockedDataSnapshot);
        //valueEventListener.onCancelled(...);

        return null;
      }
    }).when(mockedDatabaseReference).addListenerForSingleValueEvent(any(ValueEventListener.class));

    new LoginActivity().getSignedInUserProfile();

    // check preferences are updated
  }

}

您需要向模块 build.gradle 添加适当的依赖项:

testCompile 'junit:junit:4.12'
testCompile 'org.powermock:powermock:1.6.5'
testCompile 'org.powermock:powermock-module-junit4:1.6.5'
testCompile 'org.powermock:powermock-api-mockito:1.6.5'